例 1　女 ,1 0岁。因左耳后蚕豆大小肿物 2个月余 ,增大疼痛 5～ 6ｄ ,外院诊为耳后表皮囊肿感染来我院就诊。发病前无耳痛、耳漏、耳聋史 ,检查左外耳无畸形 ,耳道无分泌物 ,鼓膜完整标志存在 ,听力正常 ,无面瘫症状 ,耳后乳突尖部可见 2 .5ｃｍ× 1 .0ｃｍ大小隆起区 ,肤色正 Example 1 female, 10 years old. Due to the size of the left ear after the broad bean tumor more than 2 months, increased pain 5 ~ 6d, out-hospital diagnosis of ear epidermal cyst infection to our hospital. Before the onset of no earache, ear leaks, history of deafness, examination of the left outer ear without deformity, no secretion of the ear canal, tympanic membrane complete signs exist, normal hearing, no facial paralysis symptoms, ear mastoid tip visible 2 .5cm × 1 .0cm size Uplift, skin color is positive